package com.itheima.reggie.config;

import com.itheima.reggie.common.JacksonObjectMapper;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;

import java.util.List;

/**
 * @author GRS
 * @since 2024/4/19 下午12:36
 */
@Configuration
public class WebMvcConfig extends WebMvcConfigurationSupport
{
    @Override
    protected void addResourceHandlers(ResourceHandlerRegistry registry)
    {
        registry.addResourceHandler("/backend/**").addResourceLocations("classpath:/static/backend/");
        registry.addResourceHandler("/front/**").addResourceLocations("classpath:/static/front/");
    }

    /**
     * 扩展MVC框架的消息转换器
     */
    @Override
    protected void extendMessageConverters(List<HttpMessageConverter<?>> converters)
    {
        // 创建消息转换器对象
        MappingJackson2HttpMessageConverter messageConverter = new MappingJackson2HttpMessageConverter();

        // 设置对象转换器，底层使用Jackson将Java对象转为json
        messageConverter.setObjectMapper(new JacksonObjectMapper());

        // 将上面的消息转换器对象追加到MVC框架的转换器集合中
        converters.add(0, messageConverter);
    }
}